Boiler



Patented June l1, 1929.

ANDREW J.-GALLAHEB, 0F ST. LOUIS, MISSOURI.

.'BOILER.

Application led January 15, 1921.V Serial No. 437,529.

My invention relates to improvements in boilersand more particularly to the tubular type constructed of sections.

My primary object is to provide a boiler of simple construction, comprising sections built as integral units andhaving heads and tubes with means for interconnection whereby to provide a structure adaptable to variable capacities.

A further object of my improvements is to provide a boiler construction which will deliver a relatively large volume of dry steam with a relatively small fuel consumption, and still further object is to provide a boiler construction which may be manufactured, handled and assembled with increased facility.

My improvements consist in the novel details of the construction, arrangement and combinationof parts as fully, clearly and concisely set forth hereinafter, definitely pointed out in my claims and illustrated by the accompanying drawing, in which:

Figurel is a side elevation of a boiler constructed in accordance with and embodying my invention. Figure 2 is a transverse sectional elevation, taken on the line II, II of Fig. l. Figure 3 is a vertical, longitudinal sectional elevation of one of the outside sections or units, taken on the line III, III, Fig. 2 and Figure 4 is an enlarged detail sectional elevation showing several section fragments and means for establishing intercommunication therebetween. Referring b numerals to the drawings, D designates the' ase, whose plan presents a substantially rectangular 0blong, whose top inclines longitudinally, and which as a whole is of skeleton construction, comprising generally the sides 6, ends 7 and legs or standards 8.

By preference, and as shown, there is a sectionally horizontal flange 9 projecting inwardly from the inside face of each side 6 having as its free (inside) margin a lip 10 which inclines inwardly and upwardly, and further by preference, each end 7 is provided with one or more holes as 11. The flanges 9 are disposed in a plane beneath the uppermost margins of the sides and ends and their primary functions are to support the boiler proper. One ofthe sides 6 is provided withopenings of the burner.

in its length with a cleanout 12 and with a chute 13 formed as an integral part of the side and of a length coextensive with the cleanout 12. l/Vithin the length of the cleanout and .thereover and integrally formed with the side 1s a pair of perforated lugs 14, which constitute hangers or hinge members for a door or trap 15 which is gravity actuated to constitute a normally closed closure for the cleanout 12.

The said holes 11 are relatively aligned par- 60 allel with the inclined top of the base and transversely of the base immediately beneath the lip l0, so that when a source of heat, such as the gas burner 16, is installed and in service the lip coacts with the periphery of the burner to direct a current of air to the jet In my drawing I show two burners, one located along each flange 9, but obviously I may employ but one burner or more than two, as shown. For coaction with the lips 10 for the conduction of air supply to' the jet openings I employ the bafiles, such as 17, having lips 1()a which overlie the burners similarly to the lips 10, as recited, and which baffles are by preference supported by beads or ribs such as 18 projecting from the inside faces of the baseends 7.

In my drawing (Figure 2) I show a boiler having the two outside units or sections A and 50 B and three inside or interchangeable units or sections C. For a boiler of this capacity I have a base unit D, and a top unit E, having a Hue connection c, whose widths correspond with the combined widths of the'sec-.g5

tions A, B and C. For boilers of'greater or lesser capacity I provide bases and tops corresponding to the combined widths of the number of sections or units desired, in each instance employing sections similar to A and B, but varying the number of the inside or intermediate sections C.

As shown each outside unit or section (A and B) comprises heads 19 extending their full heights which are connected by tubes 20 g5 of triangular section and relatively uniformly spaced, with the sides of the units comprising theoutside sides of the triangles, the bases of the triangles extending horizontally inwardly from the inside faces of the units and their angular sides extending downwardlyl and outwardly to meet the inside faces o t e units.

In the one unit A, there is formed a cleanout 21, similar to the cleanout 12, in the base, between each pair of the tubes, and extending the length of each cleanout 21 there is a chute 22 forming, with a gravity trap-door 23 a normally closed opening, providing access to the tubes for cleaning and like purposes. It is to be particularly noted that the uppermost tubes ofthe units A and B are of greater capacity than the remaining tubes, that their superlicial areas exposed to the heat are relatively large, and that their longitudinal trends are inclined relative to the horizontal, t

and that the steam take-oif point is removed rom the head in the direction of the circulation course as indicated by arrows 1n Figure 3.

ylreason of the inclination of the tubes a circulation will be established tending, by momentum and gravity, to carry a water content in the steam below and beyond the steam take-off 24 hence there will be delivered from 'the take-oli2 a relatively dry steam even though a relatively wet steam is delivered from the water at the top of the head.

fIn the provision of the relatively large superficial area of the steam space I may deliver a relatively large volume of relatively dry steam in that with the water content already seplarated as recited, the steam is rapidly broug the applied heat.

The intermediate units or sections C are each of identical construction and comprise heads substantially like the heads of the units A and B and tubes 25 of triangular section,

and in the placement or installation these unitsC are alternatively relatively inverted so that the tubes immediately over the sources of heat present their horizontal (base) lines directly in the rising current of heated air and hence cause such current tobe directed transversely and then upwardly to traverse substantially the entire superficial area of each tube. lThe tubes of the next adjacent units will have their full side areas parallel with the sides of the tubes directly in the current and hence the current of heated air will be caused to pass between the sides and be,

' tween the bases and apices of all the tubes.

As shown most clearly in Figure 4 there are holes formed in the sides of the heads of .the various units in which are seated push nipples 26 and as shown in Figure 3 these holes and nipples are located at the lowermost corners of theone head as at 30 for.return water connections and at the uppermost corv ners of the opposite head as at 31 for iow water connections.

By a plugging of the flow hole in the outslde section and connecting a steam pipe with the take-o 24 the boiler is adapted for steam,

' formed, preferably b A identical, and

t to approximate the temperature of and by plugging the steam take-oil and connecting a water ow pipe with the flow hole of the one outside section the boiler, without change is. adapted for water heating.

The two outside sections or units A and B are provided with perforated lugs 27 arranged to receive tie-rods 28'which serve to hold all the units in proper assembled relationship.

It is to be particularly noted that all the boiler sections, that is, both the outside units A and B and the intermediate units C, are all casting, as integral units, hence their han ling an setting up is greatly facilitated.

It will be seen that the intermediate units C are of identical, integral construction, and

are adapted to be alternately inverted, when v The advantages of thisarrangement are that the units are of simpleconstruction and easily manufactured, are i the connecting tubes 25 are entirely within the side faces of the units so that they may be easily assembled and may lie' flat one on the other when in storage.

By reason of the arrangement and construc- 4tion ofthe doors 15 and 23 I am enabled to insert tools for cleanin the tubes and an added advantage of the disposition and hanging of the doors is that they willact as automatic reliefs for occasional excess internal pilesures due to the employment of gas as a The boiler may be equipped with the usual water-glass, level gauge cocks and other like fixtures.

I claim:

1. A steam boiler comprising verticall disposed sections arranged side by side eacli section having vertical heads at its ends, the heads at one end of the boiler rising to a plane above those at the other end, a lurality oi inclined tubes connecting the eads, with ltheir higher ends connected with that head extending to the higher plane, and a steam take-off leading from the uppermost tube of a section at a point somewhat removed from the head occupying the highest plane.

2. A steam boiler comprising unitary vertically disposed intermediate boiler sections of identical construction, each of which consists of vertical heads at the ends of the section and tubes triangular in cross section connectin the heads, such sections being arrange side by side and inverted alternately',

ing upwardly and those in the adjacent section pointing downwardly, and all the tubes constituting a tier being arranged so there is a free open space entirely across the boiler between tiers of tubes, and outside integral 5 sections constituting the side walls of the furnace and formed with vertically disposed heads and triangular tubes connecting the sections, the bases of the triangular tubes extending horizontally and inwardly from the side walls of such sections and their inner l0 angular sides extending downwardly and outwardly whereby they are substantially parallel with the opposite walls of the tubes of the next adjacent intermediate sections.

ANDREW J. GALLAHER. 

